Two-stage aromatics isomerization process
US7495137B2 · kind B2 · utility
11Cited by
24References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2008 |
| Grant date | Feb 24, 2009 |
| Priority date | — |
| Expiry date | Mar 27, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention is drawn to a process for isomerizing a non-equilibrium mixture of alkylaromatics in two sequential zones, the first zone operating in the absence of hydrogen using a platinum-free catalyst and the second zone using a catalyst comprising a molecular sieve and a platinum-group metal component to obtain an improved yield of para-xylene from the mixture relative to prior art processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.